1 /*
   2  * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /**
  25  * @test
  26  * @key headful
  27  * @bug 8160421 8161902
  28  * @summary Test to check OffScreenImageSource handles case where
  29  *          imageComplete(ImageConsumer.SINGLEFRAMEDONE) unregisters.
  30  * @run main/othervm ImageConsumerUnregisterTest
  31  */
  32 
  33 import java.io.ByteArrayOutputStream;
  34 import java.io.PrintStream;
  35 
  36 public class ImageConsumerUnregisterTest extends javax.swing.JFrame {
  37 
  38     public static void main(String[] args) throws Exception {
  39 
  40         final java.awt.Component component = new ImageConsumerUnregisterTest();
  41 
  42         // Redirect the System.err stream and verify there is no
  43         // stacktrace printed
  44         ByteArrayOutputStream rs = new ByteArrayOutputStream();
  45         PrintStream obj = System.err;
  46         System.setErr(new PrintStream(rs));
  47 
  48         String str = "";
  49 
  50         try {
  51             // Test call
  52             component.getToolkit().createCustomCursor(
  53                     component.getGraphicsConfiguration().createCompatibleImage(
  54                             16, 16, java.awt.Transparency.BITMASK),
  55                             new java.awt.Point(0, 0), "Hidden");
  56 
  57             // Convert the redirected System.err contents to a string
  58             str = rs.toString();
  59         } finally {
  60             // Reset System.err
  61             System.setErr(obj);
  62 
  63             if (!str.isEmpty()) {
  64                 throw new RuntimeException("Invalid"
  65                         + " imageComplete(STATICIMAGEDONE) call");
  66             }
  67         }
  68     }
  69 }
  70